NCBI and Uniprot Product Information
NCBI Description
This gene encodes a component of the complement system, a part of the innate immune system that plays an important role in inflammation, host homeostasis, and host defense against pathogens. The encoded preproprotein is proteolytically processed to generate multiple protein products, including the C5 alpha chain, C5 beta chain, C5a anaphylatoxin and C5b. The C5 protein is comprised of the C5 alpha and beta chains, which are linked by a disulfide bridge. Cleavage of the alpha chain by a convertase enzyme results in the formation of the C5a anaphylatoxin, which possesses potent spasmogenic and chemotactic activity, and the C5b macromolecular cleavage product, a subunit of the membrane attack complex (MAC). Mutations in this gene cause complement component 5 deficiency, a disease characterized by recurrent bacterial infections. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2015]
Uniprot Description
C5: Activation of C5 by a C5 convertase initiates the spontaneous assembly of the late complement components, C5-C9, into the membrane attack complex. C5b has a transient binding site for C6. The C5b-C6 complex is the foundation upon which the lytic complex is assembled. Defects in C5 are the cause of complement component 5 deficiency (C5D). A rare defect of the complement classical pathway associated with susceptibility to severe recurrent infections, predominantly by Neisseria gonorrhoeae or Neisseria meningitidis. An association study of C5 haplotypes and genotypes in individuals with chronic hepatitis C virus infection shows that individuals homozygous for the C5_1 haplotype have a significantly higher stage of liver fibrosis than individuals carrying at least 1 other allele (PubMed:15995705).
Protein type: Secreted, signal peptide; Secreted
Chromosomal Location of Human Ortholog: 9q33-q34
Cellular Component: extracellular region; extracellular space; membrane attack complex
Molecular Function: chemokine activity; endopeptidase inhibitor activity; protein binding; receptor binding
Biological Process: activation of MAPK activity; cell surface receptor linked signal transduction; chemotaxis; complement activation; complement activation, alternative pathway; complement activation, classical pathway; cytolysis; G-protein coupled receptor protein signaling pathway; in utero embryonic development; inflammatory response; innate immune response; positive regulation of angiogenesis; regulation of complement activation; response to stress
Disease: Complement Component 5 Deficiency; Eculizumab, Poor Response To
Research Articles on C5
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Product Notes
The Human C5 c5 (Catalog #AAA764102) is an ELISA Kit and is intended for research purposes only. The product is available for immediate purchase. The AAA764102 ELISA Kit recognizes Human C5. It is sometimes possible for the material contained within the vial of "Complement C5, ELISA Kit" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.Precautions
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